Feed-water heater



March 17, 1931. T Q McBRlDE FEED-WATER HEATER 1926 2 Sheets-Sheet lFiled June THoMAs C. MQBRmE.

@e1/1to1 @513 M emo/mag March l?, 1931. T. Q MCBRIDE LYQ? FEED WATERHEATER Filed June 4, 1926 2 Sheets-Sheet 2 A um!!! Patented Mar. 17,1931 UNITED STATES PATENT oFFlcE THOMAS C. MCBRIDE, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO WORTHING- TON PUMP AND MACHINERY CORPORATION,0F NEW YORK, N. Y., A CORPORATION OF VIRGINIA FEED-WATER HEATERApplication, led .Tune 4,

vand to provide a feed water heating apparatus.v which, is compact,light in Weight, and will occupy a small space for installation.

Also in certain types of commercially known heaters, various types ofautomatic apparatus, floats, etc., for controls, some being dependentupon the water level within the heater, are provided while the presentinvention comprehends the provision of a feed waterheating apparatus inwhich the control requires no floats or other automatic apparatus, andone which, owing to the employment of a rotaryor centrifugal hot wateror boiler feed pump, will provide a steady iiow in the discharge whichwill notl interfere with the boiler check, in contradistinction with theintermittent flow as`provided by displacement pumps.

Another object of the present invention is toprovide a ,feed waterheating apparatus particularly adaptable for use on locomotives andwhich is,designed to facilitate the replacement or repair of parts withminimum eifort and without disturbance of the connections between theheater and locomotive parts. The above is accomplished by the provisionof a feed Water heating apparatus in which the heating chamber and itsclosely related parts', in which replacement or repairs are seldomreo'juired, are formed in one casting or unit and attached to thelocomotive at any convenient point, while the pumping mechanism isformed in a unit detachably connected, preferably at the bottom of theyheating chamber unit and free from any direct connection With theVlocomotive, thereby permitting removal of the pumping unit forreplacement or' repair wlthout affecting connections between thelocomotive parts andthe heating chamber unit.

- Other features of the present inventionv 1926. Serial No. 113,620.

Water in the heating apparatus for priming the rotary or centrifugalpump which supplies the cold water to the heating chamber, said primingmehanisln also controlling the delivery of operating steam to the engineemployed for operating thepumps, whereby in starting, dry running Vofthe rotary or 'centrifugal pumps is prevented and their operation isautomatically `set up when suflicient water is in the heating apparatusto fill the pumps; and the provision of suitable passageways and meansfor directing the exhaust steam from the pump operating engineor'turbine into the heating chamber of the feed water heating apparatus.

With these objects in view, the invention consists in various featuresof construction and combination of parts, which will be first 'describedin connection with the accompany- Aing drawings, showing a feed waterheater of the preferred form embodying the invention, and the featuresforming the invention'will be specifically pointed out in the claims. y

In the drawings- Figure l is a vertical section through the improvedfeed water heater.

Figure 2 is a fragmentary side elevation of the feed water heater takenon the line 2 -2 of Figure l.

Figure 3 is a fragmentary vertical section taken on the line 3 3 ofFigure l.

Figure is a horizontal section through the heater on the line 4 4 ofFigure l.

Figure 5 is a horizontal section through the heater on the line 5 5 ofFigure l.

Figure 6 is a .horizontal section onthe line 6 6 of Figure l. Y

Figure 7 is a vfragmentary vertical section on the line 7 7 of Figure l.

with exhaust steam from locomotive cylinv ders or other suitable sourcewhich enters the f chamber 1 through the inlet 3.

The supply of cold water is from the tender (not shown) when the, heateris used on a' locomotive, and otherwise from any suitable source,through the pipe 4 to a 'rotary'pump 5.I The cold water enters thesuction 6 of the pump 5 and is forced by the impeller 7 upwardly throughthe pipe 8 into the priming chamber 9 from which it passes through thepassage 10 into the chamber 11 and thence through the spray valve 2 intotheheating chamber 1. y

The pump impeller 7 is mounted upon the shaft 12 of the pumping unit 13which shaft is driven by a turbine 14 mounted thereon.

Live steam, from anv suitable source is provided for operating theturbine 14 and this steam is delivered through a pipe '15 to a valvechamber 16 (see Figs. 1 and 4). The valve cone 17 in the valve chamber16 is operated through a series of links 18 bv a iioat 19 which vispositioned in the priming chamber 9 so that the delivery of operatingsteam to the turbine 14 will be controlled by the quantity of water orthe water level in the priming chamber 9, and when the heater isinvvater-` heating and boiler-feeding operation the steam passes throughthe valve chamber 16. pipe 20. into the chamber 21 from which it passesinto the turbine structure 14 for rotating the runner thereof. tooperate the shaft 12 and the pumps mounted thereon.

In starting the heating apparatus or at such times when' the water inthe heater is below a pre-determined level. the lowered position of theiioat -19 will position the valve 417 to prevent flow of steam to the.turbine 14' andopen 'the valve 16a to of the check valve, and throughthe cold water supply pump 5 and pipe 8 into the heating apparatus. Whenthe operation of the iet pump 24 has supplied-suiiicient water to primethe supply. pump and to raise the oat 19, the raising of the float willoperate the valve 17 to cut oii the supply of steam to the jet pump andopen the passageway of v operating steam to the turbine 14, thusautomatically setting up operation ofthe turbine and pumps.

The hot water, that is, the water which is heated in the chamber lpbyits Contact with the exhaust steam entering the heating chamber,passes'downwardly through the chamber 1 into the chamber 27 which is anextension rthe first stage of the pump 29 through the passageway 30 intothe suction ofthe second or successive stage of the pump 29, being dis`charged from the final stage of the pump through the suitablel'discharge passageway 31 to the boiler or other utilizing apparatus.

To prevent iiooding of the heaterby the varying excess of water duetosteam condensation in the'heater, an over-flow pipe 32 is provided whichrises centrally within the chamber 1 a/nd the heightJ of which controlsthe water level in the heater, yany excess water in the heater iiowsinto the over-iow pipe 32 and passes downwardly into the chamber 33 ofthe pumping unit 13. The excess or overflow is taken from the chamber 33by the return pump 34 which delivers it into the discharge of the coldwater supply pump `5, returning it, with the cold water discharged bythe pump 5, to the heater.

The cold water supply pum 5 being a centrifugal pump, the amount o waterit delivers is largely controlled by the pressure of water discharged bythe pump 5. Thus, when there is an over-flow ofl excess water from thechamber 1 through the over-flow .pipe 32 and return l(pump 34, theamount of cold water delivere to the chamber 1 will be in inverseproportion to the quantity of excess water returned to the chamber 1through thedischar'ge of the pumps 34 and 5,

and when. there is no excesswat'er over-flowing from the chamber 1 thepump 5 will operate at full capacity and compensate for the lack ofexcess water in the heating chamber. J

Inv the drawings, the return-pump 34 is shown as comprislng vanes on theback of the v impeller 7 of the pump 5, and the chamber 33 isillustrated as having communication with the chamber of the pump 5through a suitable opening 36.' 4Thus it will be seen that a singleimpeller or rotary pump 13 provided with multiple'inlets or suctions anda single dischargepermits the return of the excess water from thechamber 1 through theheater, and consequently, eliminates the loss ofany heat which this watermight contain.

While inthe drawings the Vreturn of `excess water pump 34 is shown asvanes on the back of the impeller 7 of the pump 5, it is to beunderstood -that the return pump 34 may be separate and independent ofthe pump 5, if desired without departing from the spirit of thisinvention although it is desirable to have its discharge common withthat of the pump 5.

If it is so desired, a check valve 37 of any approved construction maybe mounted in the 10 delivery or discharge pipe 8 of the cold wa.-

ter supply pump so as to prevent water being forced backwards throughthe cold water supply pump when the locomotive drivers slip or underother circumstances which might arise, and a check valve 37 ispositioned in the connection between the heating chamber 1 and thesuction of the return or excess water pump 34, thus water will beprevented from flowing by gravity from high tenders or other high watersupply sources, through the heater, which may be positioned at a lowelevation, when the pumping unit is not operating.

It is desirable to utilize the heat from the turbine exhaust bydelivering the said exhaust into the exhaust steam inlet 3, through theopening 60 as shown in the modified form illustrated in Figure 9, whereit will mingle with the exhaust steam entering the heating chamber 1.However; in the preferred form shown in the drawings, the exhaust steamfrom the turbine 14 is shown passing from the casing 'of the turbinethrough a suitable outlet or exhaust opening 38 into a chamber 39. Theexhaust steam from the turbine passes through a suitable check valve 40from the chamber 39 into the chamber 40 from which it passes through thepassageway 41 into the casing-42 of a jet condenser 4o construction 43.A by-pass 44 is provided in the heater structure which has inletcommunication with the priming chamber 9 so that a part of the coldwater delivered to the feed water heater by the pump 5 will be di-V 45verted through the passageway 44, to the passageway 44 and be directedby the nozzle 45 through the tube 46 of the jet condenser 43. The tube46 is perforated as shown at 47 so as to permit the exhaust steam fromthe turbine tobe taken up by the water passing `through the tube andcondensed and any condensate which settles in the bottom of thecondenser or chamber 42 of the jet condenser 43 will be drawn into theopen, flared bottom of the tube 46, and will pass through the tube withthe water and from the jet condenser structure 43 into the chamber 11where it mingles with the cold water supplied to the `chamber 11 fromlthe priming chamber 9 G0 `through the passageway 10, and will bedelivered through a spray valve 2 into the heating chamber 1.

An air vent 49 is provided which has communication with the chamber 50formed at the top of fthe chamber l so as to permit the escape of anyaccumulation of air from within the heater and a suitable cone or hood51 is mounted over the top of the over-flow pipe 32 so as to prevent thecold water or condensed exhaust steam from entering the overflow pipe 32from above. Movement of the check valve 40 is limited by a suitable stoplever 52 which projects into the chamber 40 in the path of movement ofthe check valve 40. A safety valve 53 is carried by the casing of thefeed water heater and has communication with the exhaust steam Linlet 3.

The feed water heating apparatus herein described is particularlyadaptable for use on locomotives, and for purposes of attachment to alocomotive suitable attaching brackets 60 are formed on the castingform` ing the heating chamber and its companion passageway and parts,while the pumping unit 13, which is attached to the lower end of theheating chamber carrying casting (the line of separation of the unitsbeing clearly shown at A in Figure 1 of the drawings) i's free from anyattachment to the locomotive. This construction permits all of theattaching bolts to be in one casting, and accurately spaced, and permitsdetachment of the pumping unit 13 containing the more intricate parts ofthe feed water heating apparat-us, for replacement, repair or for anyother purpose, without affecting the attachment of the apparatus to thelocomotives and without disturbing connectionsV between the locomotiveparts and the heating chamber unit.

The mounting of the various pumps 5, 29 and 34 and the turbine 14 on asingle horizontal shaft 12 also facilitates the above advantages andpermits the utilizing of smaller space for the heater as well aspermitting the turbine and pumps which must have greater dimension thanthe heating chamber, to be located well down and fit under the curve ofa locomotive boiler when the vfeed water heating apparatus is attachedto the side of the boiler.

The operation of the improved feed water heater will be apparent fromthe foregoing description taken in connection with the accompanyingdrawings.: However, briefly summarizing, the operation is as follows:

rlhe cold or supply water is drawn from a suitable supply source such asa tender of the locomotive (not shown) by the rotary cold water pump 5and it is delivered through the-v discharge 8 into the priming chamber 9of the heater. From the priming chamber 9 the cold water is deliveredthrough the passageway 10 to the spray valve 2 and passesthrough thespray valve in a sprayed manner into the chamber 1 where it engages withthe exhaust steam from the locomotive cylinders entering the chamberthrough the exhaust steam inlet 3. .The contact of the cold water withthe steam will heat the water and condense the steam and the resultinghot water 'and condensate will pass downwardly into the lower part 27 ofthe chamber 1- and be drawn therefrom into the initial stageof themulti-stage rotary pump 29. After passmg through the various stages ofNthe pump 29 'it is delivered from the discharge 31 of the pump to theboiler` to supply the necessary water to the boiler at a relatively hightemperature. The ejector or jet pump 24 which is brought into operationby the low water level in the control chamber 9 will draw water from thecold water supply source sufficiently to prime thepumpl 5 and operatethe float 19 which will voperate the valve 17 to deliver the line oroperating steam .to the turbine 14'. .The excess or over-flow waterfrom" the chamber 1 will be returned thereto by the return pump 34through the discharge of the4 supply pump 5.

From the foregoing description taken in connection with the accompanyingdrawings, it will be apparent that a compact, efficient and relativelysimple feed water heater embodying rotary or centrifugalturbine-operated 4pumps has been provided which willy eectively heat thefeed, water and deliver it to the boiler with a minimum loss of heat andof power. By placing the pumping unit which comprises the supply pump,excess water return pump, the boiler feed pump' and turbinev on a singleshaft, the weight and size of thefeed water heater will be materiallyreduced over types of similar heaters now in use and the heater willoccupy a' .relatively small amount of space when in-v stalled. l

It will be understood that the invention is not to beJlimited to the4speciiic construction or arrangement of parts shown but that these maybe modified widely within the invention defined by the claims.

What is claimed is: v

1. In a feed water heating apparatus, a heating chamber, a pump forvdelivering water to'said chamber, a steam inlet for said chamber topermit contact of steam and water in the chamber, a pump for removingexcess water from said chamber and having its discharge into thedischarge of said delivery pump, a pump for delivering heated rwaterfrom said chamber, and means for operating said-pumps. f

2. In a feed water heating apparatus, a heating chamber, a steam inletfor said cha-mber to permit contact of steam and water in the chamber, apumping unit including a pump for delivering water to said chamber, apump for delivering heated water from said chamber, an excess water pumpfor taking excess water fromsaid chamberand returning it-thereto, andmeans for operating said pumps. I

3. In a feed water heating apparatus, a heating chamber, a rotary pumpfor supplying cold water to said chamber, a rotary pump for vdeliveringheated water from said chamber, and a. turbine for driving said pumps,said pumps and turbine mounted upon asingle shaft.

4. Ina f eed water heater, a heating chamber, av pump for supplyingwater to said chamber, a pump for delivering heated water from saidchamber, and priming means controlled by water in the heating apparatusfor priming said supply pump.

5. In a feed water heater, a heating chamber, a pump for supplying waterto said chamber, a pump for delivering heated water from said chamber, aturbine for driving said pumps, priming means for priming said supply,and means controlled by water in the heating apparatus for controllingsaid priming means and controlling the delivery of operating steam tosaid turbine.

6. In a feed water heating apparatus, a heating chamber. a' pump forsupplying wav ter to said chamber, a pump for delivering vheated waterfrom said chamber, a turbine steam to said turbine.

8. In a feed water heating apparatus, a

housing, a heating chamber therein, a pump for supplying water to saidchamber, a pump for delivering heated water from said chamber, a turbinefor driving said pumps, said housing provided with passageways to leadthe exhaust steam from said turbine intosaid heating chamber.

9. In a feed water heating apparatus, a housing, a' heating chambertherein, a pump for supplying water to said chamber, a pump fordelivering heated water from said Y chamber, a turbine for driving saidpumps, said housing provided with passageways to lead the exhaust steamfrom said turbine into said heating chamber, said pumps and turbinecombined in a unit and mounted upon a single shaft.

10. In a feed water heating apparatus, a heating chamber, a pump forsupplying water to said chamber, a pump for delivering heated water fromsaid chamber, a turbine for driving said pumps, said heating apparatusprovided with passageways to lead the exhaust steam from said turbineinto said heating chamber, said pumps and turbines combined in a unitmounted upon a single water from said chamber, a turbine for oper-lating said pumps, said heating apparatus provlded with passageways tolead the exhaust steam from said turbine into said heating Y chamber.

l2. In a feed waterheating apparatus, a

heating-chamber, a pump for supplying Water to said chamber, an excessWater pump for taking excess Water from said chamber, said supply pumpand excess water pump having a common discharge.

13. In a feed Water heating apparatus, a heating chamber, a rotary pumpfor supplying water to said chamber,y an excess Water pump for takingexcess water from said chamber, said supply pump and excess water pumphaving a common discharge, aturbine for operating said pumps, saidheating apparatus provided with passageways for delivering exhaust steamfrom said turbine to said heating chamber.

i4. In a feed water heating apparatus, a heating chamber, a rotary pumpfor supplying Water to said chamber, an excess WaterA pump for takingexcess Water from said chamer, said supply pump and excess Water pumphaving a common discharge, a turbine for operating said pumps, saidheating apparatus provided with passageways for delivering exhaust steamfrom said turbine to said heating chamber, and a priming meanscontrolled by water in the heating apparatus for priming said supplypump.

15. In a feed water heating apparatus, a

' heating chamber, a rotary pump for supplying water to said chamber, anexcess Water pump for taking excess Water from said chamber, said supplypump and excess Water pump having a common discharge, and a check valvein the discharge of said umps to prevent backflow of Water from theating apparatus into the pumps.

16. In a feed water heating apparatus, a heating chamber, a rotary pumpfor supplying water to said chamber, an excess Water pump for takingexcess water from said chamber, said supply pump and excess Water pumphaving a common discharge, a check valve in thedischarge of said pumpsto prevent backflow of water from the heating apparatus into the pumps,and a check valve in the connection between said excess water pump andheating chamber to prevent reverse flow of water into the heatingchamber.

l?. In a feed water heating apparatus, a heating chamber, a. rotarypumpfor supplying water to said chamber, an excess water pump for takingexcess Water from said chamber, said supply pump and excess Water pumphaving a common discharge, and a check valve in the delivery from theheating chamber to the excess Water pump to prevent reverse flow ofWater into the heater.

18. In a'feed Water heating apparatus, a heating chamber, a rotary pumpfor supplying Water t0 said chamber, an excess water pump for takingexcess Water from said chamber, said supply pump and excess water pumphaving a common discharge, and priming means controlled by the Water inthe heating ap aratus for priming said supply pump.

19. n a feed water heating apparatus, a heating chamber, a rotary pumpfor supplying Water to said chamber, an excess Water "pump'for takingexcess water from said chamber, said supply pump and excess Water pumphaving a common discharge, a turbine for operating said pumps, and meanscontrolled by the Water in the heating apparatus for controlling thedelivery of operating steam to said turbine.

20. In a feed Water heating apparatus, a housingpa heating chambertherein and having a steam inlet, means for delivering Water t saidchamber for contact with said steam, and a rotary pump for deliveringhot Water from said chamber, a turbine for driving said rotary pump,said heating apparatus having passageWays for delivering exhaust steamfrom said turbine to said heating chamber.

2l. In a feed Water heating apparatus, a b

heating chamber having a steam inlet, a spray valve for delivering waterin sprays into said heating chamber for contact with the steam, a rotarypump for delivering hot Water from said chamber and means controlled bythe Water in the heating apparatus for controlling operation of saidpump.

22. In a feed water heating apparatus, a heating chamber, a pumpingunit, an engine for operating said pumping unit and a condenser forcondensing-the exhaust steam from said engine, said condenser deliveringthe condensate into said heating chamber.

28. In a feed Water heating apparatus, a heating chamber, a pumpingunit, an engine for operating said pumping unit, a jet condenser, meansfor delivering a partof the supply Water from the pumping unit to saidcondenser, said condenser receiving the exhaust steamfrom said engineand having its discharge to said heating chamber, whereby the mingledsupply Water and condensate will be delivered to said heating chamber.

2e. In a heating apparatus, a heating chamber, a cold Water supply pump,an operating engine therefor, a condenser receiving exhaust steam fromsaid engine, said heating apparatus provided with a by-pass fordiverting a part of the supply Water to said condenser.`

25. In a heating apparatus, a heating said condenser, said condenserhaving its discharge to said heating chamber.

26. In a heating apparatus, a heating chamber, a cold Water supply pump,a turbine for operating said supply pump, a condenser receiving exhaustfrom said turbine, said heating apparatus provided with a by-pass fordiverting a part of the .supply Water to said condenser, said condenserhaving its discharge to said heating chamber, and a rotary pump fordelivering heated Water from said heating chamber. f

27. In a v heating apparatus, a heating chamber, a Coldwater supplypump, a turbine for operating said supply pump, a condenser receivingexhaust from said turbine, said heating apparatus provided with a bypassfor diverting a part of the supply Water to said condenser, saidcondenser having its discharge to said heating chamber, and meanscontrolled by Water in the heating apparatus for controlling the supplyof operating stea-mto said turbine.

28. In aheating apparatus, a heating chamber, a cold water supply pump,a turbine for operating said supply pump, a condenser receiving exhaustfrom said turbine, said heating apparatus provided with' a bypass fordivertmg a part of the supply water to said condenser, said condenserhaving its discharge to said heating chamber, and primingmeanscontrolled by Water in' the heating apparatus-for priming said Coldwatersup- Ply Puma 29. In a feed water heating apparatus, a heating chamber,a cold water supply pump, a turbine for operating said pump, a condenserreceiving exhaust steam from said turbine, said heating apparatusprovided withA a by-pass for diverting a part vof the supply Water tosaid condenser, said condenser having its discharge to said heatingchamber, a jet pump and means controlled by water in the heatingapparatus for controlling` the operation of said jet pump to prime saidsupply pump, said means cutting off the delivery of steam to said jetpump and permitting delivery of operating steam to said turbine' uponthe delivery of a predetermined quantity of Water into the heatingapparatus.

30. In-a feed water heating apparatus, a cold Water supply pump, a jetpump for priming said cold Water supply pump, an engine for operatingsaid pump and means controlled by water in the heating apparatus forpermitting operation of saidjet pump 'and for cutting olf operation ofthe jet pump and permitting passage of operatin steam to the engine uponthe delivery o a pre-` determined quantity of water to the heatingapparatus. 4

31. In a feed water heating apparatus, a cold Water supply pump, a jetpump, an engine for operating said pump for priming said cold Watersupply pump and means controlled by Water in the heating apparatus forpermitting operation of said jet pump and for cutting oft' operation ofthe jetpump and permitting passage of operating steam to the engine uponthedelivery of a predetermined quantity of Water to the heatingapparatus, and a rotary pump for delivering heated Water from saidheated chamber.

32. In a feed water heating apparatus, a heating chamber, a centrifugalpump for supplying cold Water to the chamber, a return pump for takingexcess water from the heating chamber, said return pump dis; charginginto the discharge of said cold Water supplying pump whereby thedischarging capacity of said cold Water supply pump will be regulatedbythe quantity of excess water pumped from the heatmg chamber.

38. In a feed Water heating apparatus, a casting containing a heatingchamber, attaching brackets on said casting to permit its attachment toa support, a second casting detachably connected to the bottom of saidfirst casting and supported wholly by said first casting, a shaftcarried by said second casting, a plurality of pumps mounted upon saidshaft and a prime mover for operating said pumps mounted on said shaft.

34. In a feed water heatingapparatus', a casting containing a heatingchamber, attaching brackets on said casting to permit its attachment'lto a support, a second casting detachably connected to the bottom. ofsaid first casting and supported wholly by said first casting, a shaftcarried by said second casting, a cold water supply pump mounted on saidshaft, a return pump for drawing oil' excess-Water from theheatingchamber and returning it thereto mounted on said shaft, a` hotWater discharge pump mounted y on said shaft,.and a turbine foroperating said pumps mounted on said shaft.

35. In a feed Water heating apparatus, a heating chamber, a pump forsupplying Water to said chamber,'a jet pump for priming said supplypump, and means controlled by Water in the. heating apparatus forcontrolling operation of said Jet pump.'

from said turbine into said heating chamber. chamber to the discharge ofthe said pump 381 In a feed Water heating apparatus, a wherebythequantity of Water d1schargedby housing, a heating chamber therein, acen- 'the pump will be reduced 1n accordance with trifugal pump forsupplying water to said the excess water dellvered'to lts dlscharge.

5 chamber, a hot water pump for withdrawing ln testlmony whereof I aixmy s1gnature. 70

hot Water from said chamber, steam actuated THOMAS C. MGBRIDE. means foroperating said hot water pump, said housing provided with passage Waysto lead exhaust steam from said steam actuated u', means into saidheating chamber. 75

39. In a feed .water heating'apparatus, a heating chamber, a pump fordelivering Water to said chamber, said chamber having an inlet forsteam, means for removing excess Water from said chamber, said meanscon- 80 nected to the discharge of said pump for delivering the excessWater into the pump dis` charge for return to the chamber.

40. In a feed Water heating apparatus, a

heating chamber, a ,pump for delivering e5 Water to said chamber, saidchamber having an inlet for steam, means for removing excess' water fromsaid chamber, said means connected to the discharge of said pump fordelivering the excess Water into the pump dis- 90 charge for return tothe chamber, and a check valve in the discharge of said pump to preventback ow of water into the, pump.

41.`In a feed water heating apparatus, a

heating chamber, a centrifugal pump for sup- 95 plyingwater to saidchamber, said chamber having an inlet for steam, means for remov ingexcess water from said chamber, said means connected to the discharge ofsaid centrifugal pump for delivering the excess Water 10 into the pumpdischarge for return to the chamber, a turbine for operating said pump,and means controlled by the Water in the heating apparatus forcontrolling the delivery of operating steam to said turbine. 105

42. In a feed vvater heating apparatus, a heating chamber having a steaminlet, a spray valve for delivering water in sprays f into said heatingchamber for contact with the steam, a centrifugal pump for delivering110 water to said spray valve, a turbine for operating said pump, andmeans controlled by cthe Water in the heatin apparatus for controllingthe delivery ofg operating steam to said turbine. 115

43. In a feed water heating apparatus, a

heating chamber, means for spraying water into the heating chamber, -apump for deliv- 5', ering water to said spraying means, and

quantity Iin said heating chamber will proportionately reduce thedischarge of said pump. f"

o 44. In a feed water heating apparatus, a

12s heating chamber, means for spraying water into the heating chamber,a pump for delivering water to said `spraying, means, and means fordelivering excess water above a .predetermined quantity in said heating130 means whereby water above a predetermined y

